Hi all, I'm a new user of heat. Just installed on CentOS 6.4 followed by: http://docs.openstack.org/trunk/install-guide/install/yum/content/ch_heat.html The packages I'm using: yum list installed |grep -A1 heat openstack-heat-api.noarch 2013.2.2-1.0.el6 openstack-heat-common.noarch 2013.2.2-1.0.el6 openstack-heat-engine.noarch 2013.2.2-1.0.el6 python-heatclient.noarch 0.2.6-2.el6 @openstack-havana I copied template file from https://github.com/openstack/heat-templates/blob/master/hot/servers_in_existing_neutron_network_no_floating_ips.yaml. I didn't use "hello_world.yaml", because I have no knowledge of AWS... Then, I try to run heat command: heat stack-create mystack --template-file=servers_in_existing_neutron_network_no_floating_ips.yaml --parameters="image=base_image;flavor=m1.small;net_id=da3b99ed-a806-4a9e-9a3d-1aa7ebdc0cd5;subnet_id=010f0972-e28b-44fd-b759-5b2288022111;key_name=key_b-compute04" And I get error : ERROR: Unknown resource Type : OS::Neutron::SecurityGroup Anyone know why this happened ??? Thanks. -chen